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Dyfyniad Arddull ChicagoCollis, David J. Corporate Strategy: A Resource-based Approach. Boston, Mass: McGraw-Hill/Irwin, 2005.
Dyfyniad MLACollis, David J. Corporate Strategy: A Resource-based Approach. Boston, Mass: McGraw-Hill/Irwin, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.